dcm_rm_element: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/dcm_rm_element - from package: ctn

You may install the required package with command apt-get install {package}

Error in other languages:
dcm_rm_element: bevel nie gevind nie
dcm_rm_element: comandă negăsită
dcm_rm_element: comando não encontrado
dcm_rm_element: commande introuvable
dcm_rm_element: command not found
dcm_rm_element: käsku ei ole
dcm_rm_element: không tìm thấy lệnh
dcm_rm_element: komanda nerasta
dcm_rm_element: Kommando nicht gefunden.
dcm_rm_element: kommandot finns inte
dcm_rm_element: komut yok
dcm_rm_element: nie znaleziono polecenia
dcm_rm_element: níor aimsíodh an t-ordú
dcm_rm_element: no se encontró la orden
dcm_rm_element: no s'ha trobat l'ordre
dcm_rm_element: opdracht niet gevonden
dcm_rm_element: parancs nem található
dcm_rm_element: perintah tidak ditemukan
dcm_rm_element: príkaz nenájdený
dcm_rm_element: příkaz nenalezen
dcm_rm_element: команда не найдена
dcm_rm_element: командата не е открита
dcm_rm_element: 命令找不到
dcm_rm_element: コマンドが見つかりません